As per issue #1552 the mailer code currently breaks on ESMTP multiline responses. Let's negotiate SMTP instead.
Should be backported to 2.0. --- src/mailers.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/mailers.c b/src/mailers.c index 3d01d7532..34eaa5bb6 100644 --- a/src/mailers.c +++ b/src/mailers.c @@ -195,7 +195,7 @@ static int enqueue_one_email_alert(struct proxy *p, struct server *s, goto error; { - const char * const strs[4] = { "EHLO ", p->email_alert.myhostname, "\r\n" }; + const char * const strs[4] = { "HELO ", p->email_alert.myhostname, "\r\n" }; if (!add_tcpcheck_send_strs(&alert->rules, strs)) goto error; } -- 2.17.1